A bulletin board used to classify solids, liquids, and gases. Students then put words or object on the board to show examples of each state of matter. Identify objects and materials as solid, liquid, or gas.
Wonders of Water Science Project - Making Clean Water: After learning about pollution and water conservation, you could have your Brownies split into groups and make clean water that has been "polluted" with dirt and other sediments.
Another idea for talking about scientist and starting the year of science lessons. This would be good for kids to make in their science journals also. It would be neat to see what each child thinks a scientist is.